Dental articulator or relator



Feb. s, 1924. 1,482,993

J. HOMER y DENTAL ARTICULAIOR OR RELATOR Filed June 6, 1923 v @um a \%ulmu 4 ummm@ i llllllx WITNEssEs 'i u L Humm INVENTOR c/oaPHHm n .BY' J@WQ w w 7 ATTORNEYS Patented Feb. 5, 1924.

UNITED STATES 1,482,993 Parana" erstes.

JOSEPH HOMER, OF BOSTON,.MASSACHUSETTS, ASSIGNOR TO CORINNE HOMER, OF j BROOKLINE, MASSACHUSETTS. v

DENTAL ARTICULATOR OR RELATOR.

Application led .Tune 6,

To all 'whom t may concern:

Be it known that I, JOSEPH HoMnR, a citizen of the United States, and a resident of Boston, in the county of Suffolk and State of Massachusetts, have invented a new and Improved Dental Articulator or Relator, of which the following is a full, clear, and exact description.

This invention relates to a dental articu lator or relator and is related to my copending application, Serial No. 504,758, filed October 1, 1921, entitled Dental articulator.

An object of the invention is to provide an articulator having two movable jaws, one of which is normally fixed and the other of which is relatively movable with respect to; the first, the connection between the movable member and its support being a particular feature of the invention, permitting an especial movement or adjustment of the movable jaw or member not hitherto obtainable.

The invention is illustrated .in the drawings, of which- Figure 1 is a sectional view taken on the line 1-1 of Fig. 2;

Fig. 2 is a vertical sectiontaken on the line 2-2 of Fig. 1; and

Fig. 3 is a front elevation of the device. The form of the invention shown in the drawings is a preferred form` although it isunderstood that modifications in the construction and arrangement of the parts and $5 in the character of the materials used may be adopted without departing from the spirit of the invention.

In the drawings there is illustrated a dental articulator comprising a frame having a fixed jaw 1 and a? movable jaw 2, on which jaws are adapted to be mounted forms or molds of human jaws or gums on which a dentist mounts artificial teeth, and by reason of the permissible relative movement between the jaws can so aline the teeth as to give them their proper relative movement in cutting and chewing food. The fixed jaw 1 is provided at its rear end with pedestal elements 3 and 3LL pierced at their upper ends and adapted tolie adjacent the similar pierced ends 4 and 5 of an upper movable frame member 6. This upper movable frame member 6 is provided with a hollow chamber 7 which, when the frame member 6 is disposed normal position, (shown in 1923. serial Nascar/30.

Fig. 1) extends forwardly and horizontally parallel to the normal position of the fixed jaw 1. A pin 8, passing through the apertures above mentioned, pivotally connects the frame member 6 to the pedestal membersl 2 and 3.

The movable jaw 2, at its rear end, is provided with slots or holes such as 9 (see Fig. 1) or modifications, this rear end projecting normally into the chamber 7 Surrounding the rear end of the movable jaw 2 there is disposed a mass of plastic material 10 of any suitable character which will gradually harden while the movable jaw 2 is being moved in the same, thereby permitting a certain play or movement after hardening relative to the frame member 6 to which it is connected by this plastic medium. In other words, viewing the parts shown in Fig. 2, there is sufficient play between the movable jaw 2 and the frame member 6 to permit of local movement of the jaw 2 with respect to the frame 6 without moving the frame member 6. This will permit a movement of the mold or form mounted on the jaw 2 which would not otherwise be possible, or by reducing the movement before the plastic material has hardened an adjustment is permitted of the movable jaw 2 in respect to the frame 6 holding them in rigid changed relation.

I provide a crossbar 11 extending between the pedestal members 2 and 3, and passing through this bar is a screw 12 which can be clamped in a fixed position by means of a nut 13, the screw and its proper nut bearing against the lower edge or face of the frame member 6, permitting it to be adjusted and moved around its pivotal point to assume any desired position relative to the fixed jaw 1. After being adjusted the screw can be fixed by mea-ns of the clamping or lock nut 13.

1. A dental articulator comprising fixed and movable frame members, said movable frame member provided with a chamber, a jaw member having a. portion adapted to extend into said chamber, and a plastic medium disposed in said chamber surrounding the end of said jaw member to connect it to said frame member while permitting a. certain movement thereof relative to the frame member.

2. A dental articulator including a fixed and a movable frame member, one of said pedestal member, said movable frame memn'iernbers having a chamber formed therein7 ber having a chamber disposed horizontally a jaw member having a portion projecting and with its open end extending 'forwardinto said chamber7 and a mass of plastic ly When the frame member is in its normal 15 5 material disposed in said chamber around position, a movablejaw member having a the portion of the jaw member projecting portion extending into said chamber, and a thereinto to connect the jaw member to the mass of plastic., material disposed in said frame member. chamber surroumd'ng the portion of the 3. A dental artioulator which includes a movable javvextending Jfhereino. 10 fixed jaw, pedestal members on said jaw, a

movableframe memberpivoted -to said JOSEPH HOMER. 

